Intel raid controller srcsas144e User Manual

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• User specified rebuild rate (% of system resources to use from 0-100%).

• Background operating mode can be set for rebuilds, consistency checks, initialization 

(auto restarting consistency check on redundant volumes), migration, OCE, and patrol 

read.

• Enclosure management support, including LEDs.
• Activity and fault indicators per drive, port selector (dual-port drives).
• Drive coercion (auto resizing to match existing disks).
• Auto-detection of failed drives with transparent rebuild. Disk activity (I/O to the 

drive) must be present for a missing drive to be marked as failed.

• Auto-resume on reboot of initialization or rebuild (must be enabled before virtual disk 

creation).

• Smart initialization automatically checks consistency of virtual disks if there are five 

or more disks in a RAID 5 array which optimizes performance by enabling read-

modify-write mode. RAID 5 arrays of only three or overdrives use peer read mode.

• Dirty cache LED plus cache write to disk error reporting.
• Smart Technology predicts failures of drives and electronic components.
• Patrol Read checks drives and maps bad sectors.
• Commands are retried at least four times. 
• Firmware provides best effort to recognize an error and recover from it if possible.
• Failures are logged from controller and drive firmware, SMART monitor, SAF-TE 

controller.

• Failures are logged in NVRAM, viewable from OS Event Log, Intel

®

 RAID Web 

Console 2; CIM, LEDs, and via alarm.

• Multiple cache options provide choice of speed, redundancy:

— Write: The data written / (done) signal is returned when data is written to drive or 

only to cache:
^

Write-back (default): Faster, because it since doesn't wait for the disk, but 

data will be lost if power is lost.

^

Write-through: Slower, but ensures data is on the disk.

— Read Ahead: Predicts the next read will be sequential and buffers this data into 

the cache:
^

NonRead Ahead: Always reads from the drive after determining the exact 

location of each read.

^

Adaptive Read Ahead: Will read ahead and cache data only if doing 

sequential reads.